On Fri, 04/15 17:11, Kevin Wolf wrote:
> Am 15.04.2016 um 05:11 hat Fam Zheng geschrieben:
> > qcow2 is not necessarily the top layer node. Since bdrv_inactivate()
> > doesn't recurse, we should ensure all block nodes are inactivated.
> >
> > Signed-off-by: Fam Zheng <f...@redhat.com>
>
> Hm, I don't think that's quite right. bdrv_inactivate_all() should be
> the opposite of bdrv_invalidate_cache_all(), i.e. both operations should
> affect the same nodes.
>
> Currently, both use bdrv_next(), but bdrv_invalidate_cache() is
> partially recursive: It is called for bs->file (by block.c if there is
> no implementation for bs, by the driver implementation otherwise), or
> for all children in the quorum case, but not for other children like
> bs->backing or the extents for VMDK.
>
> If you think that that sounds wrong, I'm with you. :-) The question is
> how to fix it. I think I'd make bdrv_invalidate() recurse to all
> children and then do the same for bdrv_inactivate().
That makes sense, I'll try again.
Fam
>
> Kevin
>
> > block.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/block.c b/block.c
> > index d4939b4..1c575e4 100644
> > --- a/block.c
> > +++ b/block.c
> > @@ -3270,7 +3270,7 @@ int bdrv_inactivate_all(void)
> > BlockDriverState *bs = NULL;
> > int ret;
> >
> > - while ((bs = bdrv_next(bs)) != NULL) {
> > + while ((bs = bdrv_next_node(bs)) != NULL) {
> > AioContext *aio_context = bdrv_get_aio_context(bs);
> >
> > aio_context_acquire(aio_context);
> > --
> > 2.8.0
> >
